# Parameter mapping table

**Export parameter mapping table** allows the mapping of custom Revit properties to the common IFC properties, as long as they have the same data type. Similarly to the user defined property sets, this is accomplished with a text based mapping file. There is no default template included for this file, however the syntax is fairly simple:

IFC Common PropertySet Name \<TAB> IFC Property Name \<TAB> Revit Property Name

By using this method, Revit properties can be named according to the project or company standards and will be mapped according to the correct IFC terminology upon export.

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